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How the Body Works : The Immune Mechanism

How the Body Works The Immune MechanismThe immune mechanism is designed to protect the body against attack from invading microorganisms and foreign, potentially harmful molecules. There are four types of immune mechanisms. The nature of the invading antigen determines which type of mechanism is brought into action. Certain antigens promote an exaggerated response, called a hypersensitive reaction, or an allergy., which may be harmful to the body tissues.A type I reaction is an allergic response to foreign substances, usually proteins, entering the body. It is an immediate reaction which occurs within minutes or hours of the antigen entering the body. The diagram follows the events that occur in a type I response. The antigens enter the body and stimulate B-lymphocytes to produce antibodies. The antibodies then adhere to mast cells in the vessel wall. They neutralize the antigens and the mast cells release a chemical which causes, for example, the streaming eyes and the sneezing symptomatic of hay fever.A type II reaction is initiated by antigens which are part of, or closely associated with, a tissue cell. The diagram shows antigens entering the bloodstream and invoking the production of antibodies. The antibodies destroy the antigens, but they may also cause, for example, a cross reaction with blood cells which can lead to cell damage. An example of this type of reaction is a mismatched blood transfusion, in which antibodies are formed against the donor red cells, which leads to their destruction.A type III reaction is an immediate reaction occurring within a few hours of a small antigenic stimulation. The diagram shows antigens entering blood already filled with antibodies, formed during a previous exposure to these antigens. The antibodies form a complex with the antigen and a blood protein called complement. The complex so formed may damage tissue, such as the glomeruli of the kidneys, by blocking up the capillaries.The final type of reaction, the type IV reaction, is a delayed immune response which occurs more than twenty-four hours after the initial contact with the antigen. The antigens enter the bloodstream, where they stimulate T-lymphocytes to produce antibodies which remain attached to the cell wall. The antibodies then destroy the antigens. Once the T-lymphocytes have been sensitized by the antigen, they can produce antibodies and confer immunity. This is the basis of immunization against tuberculosis.

Channel: Howto & Style
Uploaded: December 31, 1969 at 4:59 pm
Author: dizzo95

Length: 02:45
Rating: 3.91
Views: 51443

Tags: Immune Mechanism The

Video Comments

vaccineshurtbabies (December 31, 1969 at 4:59 pm)

Watch my youtube series 'Vaccination: Miracle or Mayhem? Parts 1 - 5'. Vaccines have never protected anyone, let alone saved anyone's life. It's all a despicable and very dangerous racket.

FreeGlobalEnergy (December 31, 1969 at 4:59 pm)

T-Cells remember how a previous virus battle was fought FOR LIFE.The T-cells will stimulate anti-bodies so fast for a re-introduction to a virus you may never know you re-encountered it,Which is why the whole Titers & Booster shots are a total drug company sham. You do not need detectable anti-bodies floating in the blood non stop. They disappear. Doesn't matter. T-cells do not need boosters but they will instantly trigger reproduction of anti-bodies. Those pet boosters. A Big Lie,Dont need it

FreeGlobalEnergy (December 31, 1969 at 4:59 pm)

You didnt read the statement:¨Doctors do not learn about nutrition and fail to treat illness because they only sell drugs¨.Why would you suggest he talk to his doctor when Doctors are drug pushers & medical schools teach lies that avoid healing but promote disease to boost industry sales?

J0Boa (December 31, 1969 at 4:59 pm)

whoever made that video is a space monkey

okrabay (December 31, 1969 at 4:59 pm)

if you donate blood will your body rebuild the lost antibodies if you no longer suffer from those antigens?

Rahulioo (December 31, 1969 at 4:59 pm)

B lymphocytes make anti-bodies. T cells more towards killing virus,tumor cells and subtype Helper T cells enhances the production of Antibodies by B cells.

Tybalt1987 (December 31, 1969 at 4:59 pm)

T-cells don't make antibodies you fucking prat. What kind of cunt makes an incorrect science vid??

mahimurugan (December 31, 1969 at 4:59 pm)

goog

vaccineshurtbabies (December 31, 1969 at 4:59 pm)

This is the basis of immunisation against tuberculosis??!! The BCG vaccina against TB was found to be not only completely useless decades ago, in a huge WHO field trial in India, causing (most) countries to abandon its use, but was also found to be CAUSING TB, rather than preventing it. Mind you, otherr vaccines are just as useless it's just that medical science refuses to pull its head out of the sand (or its arse).

vaccineshurtbabies (December 31, 1969 at 4:59 pm)

This video makes it sound as if scientists know how the immune system works, when in fact they know very little. Let's face it, most of them are even stupid enough to believe the lie that vaccines prevent diseases.

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How the Body Works : The Immune Mechanism

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